Philip jackson



(No Model.)

' P. J AOKSON.

PRINTING MACHINE.

No. 322,609 Patented July 21, 1885.

ATTORNEYS.

N4 PETERS. Pholn-Ulhogmphur, Wa'shingicn. D C.

UNITED ST TES PATENT OFFICE.

PHILIP JACKSON, OF PLAINFIELD, NEW JERSEY.

PRiNTING-MACHINE' SPECIFICATION forming part of Letters Patent N0.322,609, dated July '21, 1885.

Application filed October 10, 1883. (No model.)

To all whom, it may concernfl Be it known that I, PHILIP JACKSON, of

Plainfield, in the county of Union and State description.

This invention relates to two-revolution printing presses, and has for its object to raise the impression-eylinder during the return of the type-bed.

My invention consists in the construction and combinations of parts, as will be hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 is partly a longitudinal and partly a longitudinal sectional elevation of my improvement in printing-presses. Fig. 2 is an end view of the same.

Thejournals A of the impression-cylinder B arejournaled in two vertically-slidingjournal-boxes, G, and pins E, provided with heads at their lower ends, project downward from the journal-boxes into recesses in the frame, as shown. Springs D surround the pins E, and act to effect a downward pressure when the weight of the cylinder is insufficient.

On each end of the shaft of the cylinder B a cog-wheel, F, is rigidly mounted, which is made integral with a smooth-edged disk, G.

On the frame H a cam-disk, J, is mounted below each smooth disk G, which cam-disks J are each madeintegral with a cog-wheel, K, the outline of which coincides with the out: line of the cam-disk J; or the outlines of the cog-wheels K may be circular, if preferred, as the rise of the cam is so slight that circular wheels can be used. The impression-cylinder B is concentrically revolved in the same direction by suitable devices. Vhen the type-table passes under the cylinder and the impression is being made, the cylinder is pressed on the type-table by the springs D, and those parts of the cam-disk J and of the cog-wheel K having the smaller diameter engage, respectively, with the smooth disk G and the cog-wheel F. When the type-table makes its return movement, those parts of the cam-disk J, and of the cog-wheel K having the larger diameter engage with smooth disk G and the cog-wheel F, respectively, and

raise the disk G and the cog-Wheel F and the Having thus described my invention, I claiman new and desire to secure by Letters Patent 1. The combination, with an impressioncylinder and gearing at opposite sides of the same, of cam-disks j ournaled below the cylinder for raising the same, and gearing connected with said cam-disks and meshing with the cylinder-gearing, whereby, when the cylinder is rotated, the cam-disks will be rotated to raise the same automatically, substantially as set forth.

2. The combination of an impression-cylinder, the shaft of which on both sides of the said cylinder is provided with gear-wheels and plain disks with two gear-wheels mounted below said cylinder and provided with camdisks, the said upper and lower gearing meshing, .and plain and cam disks, contacting whereby the cylinder will be automatically lifted, substantially as set forth.

3. In aprinting-press,thecombination,with the cylinder B, of the wheels F G and the wheels J K, thelatter mounted eccentrically on a pintle, M, substantially as herein shown 

